A plant growth control system is disclosed. The plant growth control system includes: an information collection device, a processor coupled to the information collection device, and a controllable light source. The information collection device is configured to acquire growth information of a plant, the growth information including at least one of branch and leaf distribution information of the plant or flower distribution information of the plant. The processor is configured to determine, according to the growth information, a target irradiation position of the plant for the controllable light source to irradiate, and control the controllable light source to irradiate the target irradiation position of the plant.
